Can opener



FIG. 1 is a top perspective view of a can opener showing my new design;

FIG. 2 is a bottom plan view rotated clockwise from the position of FIG. 1;

FIG. 3 is a front elevational view thereof with reference to FIG. 2; and

FIG. 4 is a side elevational view thereof with reference to FIG. 2. 

The ornamental design for a can opener, as shown and described. 